These may be divided into a series of superficial -and deep channels. The former are situated in the capsule of the liver and form a capillary reticulum with small meshes, the larger branches of which accompany the arteries in pairs and communicate with each other by trans verse anastomoses. They are found in Glisson's capsule, and they also form a network somewhat larger meshed than the preceding. They accompany the hepatic artery and portal vein and their branches into the interior of the liver, and form anastomoses with the superficial lymph vessels. The lymph canals may easily be injected with colored material (carmine glycerine) by filling a large hypodermic syringe with the liquid and injecting one of the larger lymph-vessels in the hilus of the liver. The syringe may be refilled three or four times without removing the canula, and the injection must be made in the direction of the normal lymph-current. In this way the colored liquid will flow backward into the smaller vessels.
During the injection of the larger branches their proximal ends should be secured by clamps or ligatures.